/*
 * Copyright (c) 2023 ForteScarlet.
 *
 * This file is part of Simple Robot.
 *
 * Simple Robot is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * Simple Robot is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with Simple Robot. If not, see <https://www.gnu.org/licenses/>.
 */

package love.forte.di.core

import kotlin.contracts.ExperimentalContracts
import kotlin.contracts.contract

@OptIn(ExperimentalContracts::class)
internal inline fun <T> T?.ifNull(msg: () -> String): T {
    contract {
        returns() implies (this@ifNull != null)
    }
    if (this == null) {
        throw NullPointerException(msg())
    } else {
        return this
    }
}
